Turbine pump



TURBINE PUMP Filed Nov. 2'7, 1922 jvlfla'oy: C E. J 0

l 45:13 Y arms IN,

HTTORMEYS.

Patented May 21, 1929.

' UNITED STATES PATENT OFFICE.

CARL E. JOHNSON, 01' LOS ANGELES, CALIFORNIA, ASSIGNOR TO UNITED STATESm- 'DUSTRIES, ING, CORPOB iTION OF CALIFORNIA.

TURBINE PUMP.

Application filed November 27, 1922. Serial No. 603,487.

This invention relates to electrically driven deep well turbine pumpingequipment.

Deep well turbine pumps are comprised of an impeller system which isplaced within the I well casing, a drive shaft extending verticallythrough the well casing by which the impeller system may be driven fromthe surface of the ground. The drive shaft is rotated in some cases by abelt which drives a pulley mounted upon the upper end of the drive shaftfrom a pulley of an adjacently placed motor while other turbine pumpsare driven by a direct connected motor which is mounted upon thedischarge head of the pump and coupled to the drive shaft, thuseliminating the pulleys and belting.

The installation of direct connected motor drive requires considerableskill owing to the number of bearings employed which must be mounted inworkable alignment and require constant attention thereafter.

It is an object of the invention to provide an improved form ofelectrically driven turbine for deep well pumping, which is adapted tothe same utility as those pumps now em ployed equipped with directconnected motor drives, which is much more simple and economical inconstruction, and which is selfaligning owing to the utilization of asingle bearing member in the drive head.

This improved electric 'drive employs a rotor and a stator magneticallylinked to accomplish the rotation of the rotor. .The rotor is mounteddirectly upon the pump drive shaft and is maintained centrally and inalignment by an especially constructed bearing unit which is providedwith a number of ball bearing members which operate in a bath of oil.

The especial advantages and further ob jects of my invention will bemade evident hereinafter.

Referring to the drawing which is for illustrative purposes only,

Fig. 1' is an elevational view showing a pump head equipped with anelectric drive embodying the features of my invention.

Fig. 2 is an enlarged section illustrating the improved electric drivemounted upon the pump head as shown in Fig. 1.

Fig. 3 is a horizontal section taken upon a plane represented by theline 3-3 of Fig. 2.

In Fig. 1 of the drawing, a well casing 11 is shown in which a pumpcasing 12, having bearing members 13, is placed. The bearing members 13of the casing 12 support a centrally disposed drive shaft 14 by whichthe turbine impellers, not shown, are rotated. In my invention the shaft14 is extended up through the top of the discharge head 16, a packingmember 17 being employed as operating conditions may require. Upon thehead 16 a bearing casting 18 is mounted providing an upwardly pointedcup 20, disposed concentrically with regard to the upwardly extendingshaft 14.

By means of a ring 21 a stator 22 comprised of punchings 23 and windings24 is mounted concentrically with the shaft 14. A hearing hub 26 isprovided having a number of radial ball bearing units 27 which arespaced upon the hub 26 by accurately ground sleeves 28 and clampedthereupon by a ring nut 29. The member 26 is bored at 30 to receive theupper end 31 of the shaft 14, and is secured upon the shaft by a nut 32and maintained in rotating relationship therewith by a key 33. After thecasting 18 is placed over the shaft, the hub 26 is installed upon theshaft .14 and when so installed the ball bearing members 27 rest withinthe cup 20 which is bored to fit the cylindrical faces of the outer ballbearing rings35. A thrust bearing 36 is employed between the bottom ofthe'cup and the ring nut 29 secured to the member 26, this thrustbearing 36 being employed for the purpose of supporting the weight ofthe shaft 14.

A cylindrical member 40 which is of inverted cup form is provided withrotor punchings 41 having compensatin coils 42 and may be secured uponthe mem er 26 b screws 43 which thread into the flange 4 of the member26. A tube 48 extends up- Wardly from the bottom of the cup 20 within acounterbore 49 formed in the lower end of the member 26 and prevents theleakage and wastage of oil in which the bearings 27 are maintained, thisoil being supplied through "closely mounted within the cup serve tocentralize the member 26 and the rotor member 40 secured thereto as wellas ccntralizing the upper end of the shaft 14.

It will readily be perceived that such a bearing as I employ will holdthe rotor in rigid alignment with the stator, and that the weight of theshaft will serve to hold the member 26 securely down against the thrustbearing 36, therefore, eliminating require- ,ment for other thrustbearings, to control the axial movement of the rotor.

The deviceherein described and shown in the drawing constitutes a markedimprovement over the standard form of direct connected motor drive, asthe alignment of ')arts is controlled entirely'by the placing o boltholes in the head 16 to receive the castings 18 and 21 and the locatingof holes through which cap screws are passed in securing the ring 56which sustains the stator punchings 23. These holes are customarily alldrilled and threaded in the factory and the installation of the driveconsists essentially of placing the parts together in the manner shown.By such construction the. multiplicity of bearings now found in thedischarge head and the direct connected motor employed therewith is cutdown to a single bearing member, thus eliminating the necessity forflexible couplings, and reducing the number of bearings which must beperiodically oiled.

I claim as my invention:

1. In a centrifugal pump, the combination of: a discharge head; a shaftextending upwardly through said discharge. head, said shaft supportingthe impellers of the pump; a bearing member rigidly secured to saiddischarge head; bearings between said shaft and said bearing memberwhereby said shaft is rotatably supported in said bearing member; astator rigidly secured to said bearing member; and a rotor turningfreelyinside said stator and supported wholly upon a free end of saidshaft which projects above said bearing.

2. In a centrifugal pump, the combination of: a discharge head; a shaftextending upwardly through said discharge head, said shaft supportingthe impellers of the pump; a

a bearing member rigidly secured to said discharge head; bearingsbetween said shaft and said bearing member whereby said shaft isrotatably supported in said bearing memher; a stator rigidly secured tosaid bearing member; and a rotor turning freely inside 05 said statorand supported wholly upon a free end of said shaft which projects abovesaid bearing, said bearings extending up inside said rotor.

3. In a centrifugal pump, the combination of: a discharge head; abearing member rigidly secured to said discharge head; a stator securedrelatively to said bearing member; a shaft having a bearing hub securedthereto, said shaft supporting the impellers of the pump; a bearingplaced on said bearing member and arranged to rotatably support saidbearing hub and said shaft; and a rotor having a central opening, saidrotor being wholly supported by the upper end of said shaft in such amanner that said bearing hub rests within said central opening.

4. A pump as described in claim 1 in which said bearing member comprisesa cup in which said bearings are located.

5. In a rotary pump mechanism, the combination of ,a vertical dischargecasing, a casing forming the upper end of the discharge casing, a standsupported on the casing head, and an electric motor mounted on thestand, said motor having a hollow operating shaft, and an actuatingshaft for the pump extending through and engaging the hollow operatingshaft of the motor.

6. In a rotary pump mechanism, the combination of a vertical dischargecasing, a

casing and through and connected to said hollow shaft, and meanssupported by the hollow shaft for longitudinally adjusting the actuatingshaft.

7. A rotary pump mechanism comprising an electric motor having a hollowrotor, a pump shaft extending through the hollow rotor, means supportingsaid pump shaft on said rotor, and a thrust bearing receiving thecombined longitudinal thrust of the pump shaft androtor, said bearingbeing connected to the rotor.

8. In a rotary pump mechanism, the combination of an electric motorhaving a hollow rotor, a vertical pump shaft extending through therotor, means disposed above the motor. for vertically adjusting the pumpshaft while maintaining the rotor in set ver-. tical adjustment, meansfor connecting the pump shaft to the rotor, and bearings connected tothe rotor.

9. In a rotary pump mechanism, an electric motor having a hollow powermember and a rotor mounted thereon, a vertical pump shaft extendingthrough the power member, means connecting the pump shaft .to the motor,and a bearing contacting with thepower member, saii disposedintermediate the top' and bottom of the rotor.

In; a rotary pump mechanism, an elec- 5 trio: motor having a. rotorincluding a hollow power member; said power member extending below therotor, a vertical pump shaft extending through the power" member, meanseonneeting the pump shaft to the motor, a sleeve radial bearingextending up into the rotor so as to providea-bearingjor the same; en011 reservolrbelow the rotor; and aroundi the pump shaft and' anoiliretainin sleeve extending up between the power mem er and pumpshaft.

In testimony whereof, lha-ve hereunto set my hand at LosAngeles-,,Qalifornia, this 22nd day of November, 1922':

CARL JOHNSON.

